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353 results about "Exact match" patented technology

System for forwarding packets with hierarchically structured variable-length identifiers using an exact-match lookup engine

One embodiment provides a system for forwarding packets with hierarchically structured variable-length identifiers (HSVLIs), wherein the computer includes a processor. During operation, the system converts an HSVLI into a number of fixed-length addresses, wherein the HSVLI indicates a piece of content and is hierarchically structured, and comprises contiguous components ordered from a most general level to a most specific level. In addition, the length of a respective HSVLI is not fixed. The system further performs an effective longest-prefix-match lookup by performing multiple exact-match lookups based at least on the fixed-length addresses.
Owner:CISCO TECH INC

Point cloud automatic registration method based on normal vector

ActiveCN103236064AMeet registration requirementsRealize automatic registrationImage analysisFeature vectorExact match
The invention relates to a point cloud automatic registration method based on normal vector. According to the method, processing objects are two or more than two pieces of three-dimensional point cloud data, wherein overlapped part exists every two pieces of adjacent three-dimensional point cloud data. The method comprises the following processing steps that (1) feature points are selected according to the point cloud local normal vector changes; (2) the histogram feature quantity is designed for carrying out feature description on each obtained feature point; (3) the initial matching dot pair is obtained through comparing the histogram feature vector of the feature points; (4) the precise matching dot pair is obtained through applying the rigid distance constraint condition and combining a RANSAC (random sample consensus) algorithm, and in addition, the initial registration parameters are obtained through calculation by using a four-element method; and (5) an improved ICP (iterative closest point)) algorithm is adopted for carrying out point cloud precise registration. The point cloud can be automatically registered according to the steps. The method has the advantages that feature description is simple, identification degree is high, higher robustness is realized, and registration precision and speed are improved to a certain degree.
Owner:SOUTHEAST UNIV

Collection synchronization using equality matched network names

One embodiment provides a system that facilitates synchronization collections of data between a local and a remote node by using exact match names. During operation, a local node receives an advertisement corresponding to a remote manifest at a remote node. A manifest represents a collection of content objects at a node. In some embodiments, a manifest corresponds to a root hash value that identifies the content objects of the collection. The local node determines that the local manifest and the remote manifest both indicate the same collection of content objects. The local node then determines if the content of the collections are different by comparing the root hash value of the local manifest with the root hash value of the remote manifest. Responsive to determining that the root hash values of the manifests are different, the local node retrieves the remote manifest by sending a request for the remote manifest. The local node determines which content objects identified in the remote manifest are different from the content objects identified in the local manifest. The local node transmits a set of interests for the content objects that are different and receives the requested set of content objects, thereby facilitating synchronization of content objects associated with the manifests at both the local and remote node.
Owner:CISCO TECH INC

System and method for enhancing e-commerce using natural language interface for searching database

A system and method for enhancing e-commerce using a natural language interface. The natural language interface allows the user to formulate a query in a natural language form, rather than in conventional search terms. The natural language interface provides the user with a "user friendly" interface. The natural language interface can process a query even if there is not an exact match between the user formulated search words and the content in the database. Furthermore, the natural language interface is capable of processing misspelled queries or queries having syntax errors. The method for enhancing e-commerce using a natural language interface comprises the steps of accessing a user interface provided by a service provider, entering a query using a natural language interface, the query being formed in a natural language, processing the query by the natural language interface, searching a database using the processed query, retrieving results from the database, and providing the results to the user. The system for enhancing e-commerce on the Internet comprises a user interface for receiving a query in a natural language form, a natural language interface coupled to the user interface for processing the query, a service provider coupled to the user interface for receiving the processed query, and one or more databases coupled to the user interface for storing information, wherein the system searches the databases using the processed query and provides the results to the user through the user interface.
Owner:GO ALBERT FRANCE

Longest Prefix Match Scheme

ActiveUS20130031077A1Effectively reduces quantization lossComparison of digital valuesTransmissionExact matchIPv4
A LPM search engine includes a plurality of exact match (EXM) engines and a moderately sized TCAM. Each EXM engine uses a prefix bitmap scheme that allows the EXM engine to cover multiple consecutive prefix lengths. Thus, instead of covering one prefix length L per EXM engine, the prefix bitmap scheme enables each EXM engine to cover entries having prefix lengths of L, L+1, L+2 and L+3, for example. As a result, fewer EXM engines are potentially underutilized, which effectively reduces quantization loss. Each EXM engine provides a search result with a determined fixed latency when using the prefix bitmap scheme. The results of multiple EXM engines and the moderately sized TCAM are combined to provide a single search result, representative of the longest prefix match. In one embodiment, the LPM search engine supports 32-bit IPv4 (or 128-bit IPv6) search keys, each having associated 15-bit level 3 VPN identification values.
Owner:AVAGO TECH INT SALES PTE LTD
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